El Diumenge, 16 de novembre de 2014, a les 13:50:03, Jeremy Whiting va
escriure:
> Hey all,
>
> I recently fixed attica's plugin loading so it now finds and loads the
> attica_kde.so plugin but when applications using knewstuff (and thus
> attica) close it's giving a segfault when the PlatformDependent object is
> destructed. I've not done much at all with plugins in the past, but I've
> never seen a backtrace like this and thought someone else on this list must
> have and would know how to fix it or what's going wrong.
>
> To test I'm running khotnewstuff (from knewstuff tests folder) and on
> closing the dialog I'm getting this backtrace from the segfault.
Try running it with valgrind, may tell you something more itneresting.
Cheers,
Albert
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff720057e in
> QExplicitlySharedDataPointer<QNetworkConfigurationPrivate>::~QExplicitlyShar
> edDataPointer (this=0xa13810, __in_chrg=<optimized out>)
> at
> ../../include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qshareddata.h:
> 156
>
> 156 inline ~QExplicitlySharedDataPointer() { if (d &&
> !d->ref.deref()) delete d; }
> (gdb) bt
> #0 0x00007ffff720057e in
> QExplicitlySharedDataPointer<QNetworkConfigurationPrivate>::~QExplicitlyShar
> edDataPointer (this=0xa13810, __in_chrg=<optimized out>)
> at
> ../../include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qshareddata.h:
> 156
>
> #1 0x00007ffff71ff978 in QNetworkConfiguration::~QNetworkConfiguration
> (this=0xa13810, __in_chrg=<optimized out>)
> at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/network/bearer/qnetworkconfigurati
> on.cpp:304
>
> #2 0x00007ffff71bd9e1 in
> QNetworkAccessManagerPrivate::~QNetworkAccessManagerPrivate (this=0xa13740,
> __in_chrg=<optimized out>)
> at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/network/access/qnetworkaccessmanag
> er.cpp:1488
>
> #3 0x00007ffff71bda6c in
> QNetworkAccessManagerPrivate::~QNetworkAccessManagerPrivate (this=0xa13740,
> __in_chrg=<optimized out>)
> at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/network/access/qnetworkaccessmanag
> er.cpp:1499
>
> #4 0x00007ffff4e63c70 in QScopedPointerDeleter<QObjectData>::cleanup
> (pointer=0xa13740) at
> ../../include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qscopedpointer
> .h:54
>
> #5 0x00007ffff4e6225b in QScopedPointer<QObjectData,
> QScopedPointerDeleter<QObjectData> >::~QScopedPointer (this=0xa13008,
> __in_chrg=<optimized out>)
> at
> ../../include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qscopedpointer
> .h:101
>
> #6 0x00007ffff4e577db in QObject::~QObject (this=0xa13000,
> __in_chrg=<optimized out>) at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/corelib/kernel/qobject.cpp:882
> #7 0x00007ffff71bae03 in QNetworkAccessManager::~QNetworkAccessManager
> (this=0xa13000, __in_chrg=<optimized out>)
> at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/network/access/qnetworkaccessmanag
> er.cpp:466
>
> #8 0x00007ffff38e4ba5 in KIO::AccessManager::~AccessManager
> (this=0xa13000, __in_chrg=<optimized out>) at
> /home/jeremy/devel/kde/src/frameworks/kio/src/widgets/accessmanager.cpp:121
> #9 0x00007ffff38e4bd4 in KIO::AccessManager::~AccessManager
> (this=0xa13000, __in_chrg=<optimized out>) at
> /home/jeremy/devel/kde/src/frameworks/kio/src/widgets/accessmanager.cpp:126
> #10 0x00007ffff4e59150 in QObjectPrivate::deleteChildren (this=0xa12a10) at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/corelib/kernel/qobject.cpp:1950
> #11 0x00007ffff4e57768 in QObject::~QObject (this=0xa0eff0,
> __in_chrg=<optimized out>) at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/corelib/kernel/qobject.cpp:1030
> #12 0x00007fffd95e77ce in
> Attica::KdePlatformDependent::~KdePlatformDependent (this=0xa0eff0,
> __in_chrg=<optimized out>)
> at
> /home/jeremy/devel/kde/src/kde/workspace/plasma-desktop/attica-kde/kdeplugin
> /kdeplatformdependent.cpp:58
>
> #13 0x00007fffd95e7806 in
> Attica::KdePlatformDependent::~KdePlatformDependent (this=0xa0eff0,
> __in_chrg=<optimized out>)
> at
> /home/jeremy/devel/kde/src/kde/workspace/plasma-desktop/attica-kde/kdeplugin
> /kdeplatformdependent.cpp:61
>
> #14 0x00007ffff4e10947 in QLibraryPrivate::unload (this=0xa02f50,
> flag=QLibraryPrivate::NoUnloadSys) at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/corelib/plugin/qlibrary.cpp:548
> #15 0x00007ffff4e1240d in QLibraryStore::cleanup () at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/corelib/plugin/qlibrary.cpp:394
> #16 0x00007ffff4e10449 in qlibraryCleanup () at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/corelib/plugin/qlibrary.cpp:418
> #17 0x00007ffff4e10467 in (anonymous
> namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_
> (this=0x7ffff510cf11 <(anonymous
> namespace)::qlibraryCleanup_dtor_instance_>,
> __in_chrg=<optimized out>) at
> /home/jeremy/devel/kde/src/qt5/qtbase/src/corelib/plugin/qlibrary.cpp:420
> #18 0x00007ffff3fad60f in __cxa_finalize () from /usr/lib/libc.so.6
> #19 0x00007ffff4bc7e53 in __do_global_dtors_aux () from
> /home/jeremy/devel/kde/src/qt5build/qtbase/lib/libQt5Core.so.5
> #20 0x00007fffffffe140 in ?? ()
> #21 0x00007ffff7dea817 in _dl_fini () from /lib64/ld-linux-x86-64.so.2
> Backtrace stopped: frame did not save the PC
>
> If I change KDEPlatformDependent to keep a QNetworkAccessManager instead of
> the KIO::AccessManager it doesn't segfault (but I guess we lose the kio
> desktop integration in thep process) Any idea what is going on here?
>
> thanks,
> Jeremy
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